等离子体的临界温度

Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only withi

发表于:2018-12-01 / 阅读(296) / 评论(0) 分类 新东方背诵文选

Now the speed of light is a very,very big number. 光速是个很大的数字 So if we just take a small amount of mass, 所以只要一点点质量 you get a huge amount of energy. 就含有大量能量 And that's the energy which actually powers ou

发表于:2018-12-07 / 阅读(210) / 评论(0) 分类 太阳科普

This is the VOA Special English Development Report. Before refrigerators, homes usually had ice boxes. But another way to keep food cool without the need for electricity is to use an evaporative cooler. This is easy to make and does not even use ice.

发表于:2018-12-07 / 阅读(122) / 评论(0) 分类 VOA慢速英语2007年(二)月

This is the VOA Special English Development Report. Indonesian women sell their harvest in a traditional floating market Before refrigerators were invented, the next best thing was an ice box. But another way to keep food fresh is to use an evaporat

发表于:2018-12-07 / 阅读(134) / 评论(0) 分类 VOA慢速英语2009年(十一)月

Situation Critical 十万火急 by Kevin Lustig In some jobs, danger can appear at any moment. In the blink of an eye, the routine can become perilous. This month, the National Geographic Channel shows us what happens when a normal situation becomes

发表于:2018-12-08 / 阅读(176) / 评论(0) 分类 常春藤解析英语

The UN has just issued a report saying that six million people in Myanmar need food right now. How critical is the situation? It's a real paradox, because in the same year that Cyclone Nargis devastated the, what had been the rice bowl of Myanmar, th

发表于:2018-12-11 / 阅读(173) / 评论(0) 分类 访谈录2009

In Houston, Flight director Kranz is trying to make sense of the barrage of information. I am completely surrounded with reports coming in that I dont fully understand, but frankly, problems are our business, and I thought we are going to solve these

发表于:2018-12-30 / 阅读(216) / 评论(0) 分类 国家地理2007年

By Greg Flakus Houston 05 March 2008 Hillary Clinton made a stunning comeback in Tuesday's primaries and caucuses, winning decisively in Ohio and Rhode Island and coming out on top of a close race in Texas. John McCain won all four states, to clinch

发表于:2019-01-08 / 阅读(157) / 评论(0) 分类 VOA标准英语2008年(三月)

By Melinda Smith Washington 06 September 2007 In 2006, the World Health Organization issued a report that a critical shortage of doctors and nurses has contributed to severe health problems in Africa and parts of Asia.The report said at least four mi

发表于:2019-01-08 / 阅读(208) / 评论(0) 分类 2007年VOA标准英语(九月)

Some bacteria have adapted to super cold environments for millions of years. And scientists have isolated some of the essential genes that allow bacteria to tolerate their harsh living conditionsbecause these same genes might help in the creation of

发表于:2019-01-11 / 阅读(174) / 评论(0) 分类 英语杂谈

How to build an evaporative cooler. Also, how to prepare fruits and vegetables for cold storage. Transcript of radio broadcast: 08 June 2008 This is the VOA Special English Development Report. Before refrigerators, homes usually had ice boxes. But a

发表于:2019-01-11 / 阅读(166) / 评论(0) 分类 VOA慢速英语2008年(六)月

Fusion is how stars produce energy. It occurs when the nuclei of light atoms, such as hydrogen, are fused together under extreme pressure and heat. Tokamak Energy, from Oxfordshire, believes that the third version of their compact, spherical tokamak

发表于:2019-01-17 / 阅读(227) / 评论(0) 分类 2015CRI中国国际广播电台

好吧 Well... -那我该给克瑞普克下毒 -不 - I suppose I could poison Kripke. - No! 不 这其实很简单 No. It's a simple matter. 有那么几种有毒化学物 There are several toxic chemicals 尸检是查不出来的 that'd be untracea

发表于:2019-01-28 / 阅读(164) / 评论(0) 分类 生活大爆炸第三季

BEIJING, Dec. 11 (Xinhua) -- China is faced with severe challenges in collecting enough blood plasma to produce medicines, Health Minister Chen Zhu said Sunday. Chen called on the public to join blood donation after donating blood plasma at the Beiji

发表于:2019-02-07 / 阅读(152) / 评论(0) 分类 英语新闻

You might not realise it, but sending even a short email has an impact on the environment. 你可能没有意识到,即使是发送一封小小的邮件也会对环境产生影响。 Scientists estimate that an email adds about four grams (0.14 oun

发表于:2019-02-08 / 阅读(196) / 评论(0) 分类 阅读空间

In the Pacific state of Hawaii, U.S. President Barack Obama on Sunday told leaders of the 21 Asia Pacific Economic Cooperation economies that the region will be key to U.S. economic recovery. With much of the formal summit activity, including a worki

发表于:2019-02-08 / 阅读(153) / 评论(0) 分类 英语新闻

One of my favorite examples of liminal excellence comes from the late Dr. Claudia Alexander, 我最欣赏的一位具有交叉才能的榜样是已故的克劳迪娅亚历山大博士, a black woman plasma physicist, who passed away this past July

发表于:2019-02-13 / 阅读(150) / 评论(0) 分类 TED演讲国际问题篇

Listen to the statements and check the correct answers. 1.Is sweeping out the tiny dust bothering you a lot? From now on if you have this machine, doing the housework will become a very easy job. This is a portable vacuum cleaner. lt's light and wire

发表于:2019-02-17 / 阅读(132) / 评论(0) 分类 英语听力练习题

By Scott Stearns Dakar 08 October 2009 Cameroon President Paul Biya (file photo) Authorities in Cameroon have closed a private FM radio station that has been broadcasting illegally from the capital for several months. The station was highly critical

发表于:2019-02-18 / 阅读(139) / 评论(0) 分类 VOA标准英语2009年(十月)

CHENGDU, May 5 (Xinhua) -- Chinese Health Minister Chen Zhu donated plasma on Saturday in Chengdu, capital of southwest China's Sichuan Province, and called on health workers to take the lead in blood donation to ease the country's blood supply short

发表于:2019-02-18 / 阅读(152) / 评论(0) 分类 英语新闻
学英语单词
a portfolio bid
absolute form
Adinandra macrosepala
Akkeshi
al-hakam
Alcolea del Pinar
asaut
audit planning and control questionnaire
auxiliary barrel arbor
azido radicals
bampire tap
blackout lamps
bobke
Bāgsoti
chloramphenicol syrup
conciliarity
condensation steam turbine
convergence error
creasoted
Csongrad
cumulative translation adjustments
cytoplasmic process
dead reckoning navigation
different amounts of phosphorus
distributours
donkey-pump
entoneural system
exorcizable
fashion after
fibre coating material
flight plan-aided tracking
folliculate
force feed type sower
fuck princesses
Garinskiy
high pressure connection
Huesca, Prov.de
hydrolability
I-n-Choumaguene
ideal focusing magnetic field boundary
idle call
incitingly
Killarney, L.
Kunming quasi-stationary front
Le Gault
Liliopsida
lower bridge
mechanical science
micropulleys
midi-dress
Miopithecus
motherlovers
multi-religious
n-dinonyl ketone
night bombing aeroplane
nightcart
Nordfriesland
novelries
oxoanion
paplaka
Parnassia deqenensis
passenger
period of accrual of interest
personal action
platform container
polyglycol ether
polysaprobic zone
pro-feminist
Probencid
property trust
railyards
redetects
republikaners
reverse azimuth
Rhizopogon
rivet structure
roedeers
scientific and technical literature
sculture
septic poison
shallow burialism
sheer-legs
shutter lag
sine pulse
slotmachine
subhumans
sweet potato shochu
tachybaptus ruficollis
tenue mesenteriale intestinum
termagancies
the printing press
ticket inspector
tororo
treguenda (italy)
two minute turn
two-terminal measurement
unifocal
variable frequency generator
ventilation function
wincer
Winston-Salem
zetorchestes aokii